Datalogger LED

sws

I notice that the red LED on my datalogger is constantly on.... is there any way to turn it off? I have a battery powered application that is sensitive to current drain, and my system is otherwise sleeping most of the time...

Microcontrolled

Remove it.

▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
Toys are microcontroled.
Robots are microcontroled.
I am microcontroled.


If it's not Parallax then don't even bother. :-)
·

Mini-Din/PS2 connectors are for sale! 5 for $1! PM me if you wish to make an order.
Cheap·shipping unless specified!··········150 left!!··

phil kenny

Another solution which will completely stop the data logger from
draining battery power when it isn't needed is to use a p-channel
FET to switch power to the data logger.

See Tracy Allen's comments at:

http://forums.parallax.com/showthread.php?p=814170

Use one of the Stamp pins to control the gate of the p-FET.

phil

sws

Thanks, I'll try that!

phil kenny

A good p-Fet to use is the Supertex TP0606 available from Mouser.com
for $0.60.

It is a logic level device in a TO-92 package and is easily controlled by
the Stamp.

phil

sws

Thanks for the advice. I wonder if the datalogger resumes where it left off when turned back on, or does it have to go through an initialization or wait time before resuming logging?

Unsoundcode

Hi , the logger won't resume when power is cycled but power on can be detected and appropriate actions taken. This process can·optimized , heres a link to a discussion about logger boot up options.

http://forums.parallax.com/showthread.php?p=821241

Jeff T.

sws

Looks useful for some applications, but I think my cycle (about 30 seconds) is too short to take advantage of those options though. I am wondering if the "running" current of 25 mA drops back to the 2 mA "standby" current automatically when not writing, or do I need to put it in standby mode with code or hardware?